A selection routine based upon taking a group of names in series, skipping a group, taking another group, etc. E.g., a cluster selection on an nth name basis might be the first 10 out of every 100 or the
first 125 out of 175, etc; a cluster selection using limited ZIP Codes might be the first 200 names in each of the specified ZIP Codes, etc.
The Six Vital Variables of Performance Marketing: Testing Markets, Products, Prices, Offers, Media/Materials, Creative Approaches.
There are basically six major factors which affect the viability of any performance marketing operation, and it is important that you accept from the outset that each of them is variable, and you must test …